Work

To calculate the work done in lifting an object, we use the formula for work done against gravity:

where is the work done, is the mass of the object, is the acceleration due to gravity (approximately ), and is the height.
Given:


Substituting these values into the equation:


The theoretical value is close to the provided correct answer of . The options may reflect a rounding in the gravitational constant or other simplifications in exam questions. Thus, the most appropriate answer is .

Given: Force applied,
Distance moved,
Angle with horizontal,

Step 1: Formula for Work Done The work done by a force is given by: where: - is the force, - is the displacement, - is the angle between the force and displacement.

Step 2: Substitute the given values Substitute the given values into the formula:

Answer: The correct answer is option (a): 100 J.